Cialis (tadalafil) is usually recommended for patients diagnosed with impotence, or erectile dysfunction, the latter being a more accurate term for the condition. This drug should be taken an hour before having sex and will provide you with 36 hours of efficiency. Tell your doctor if you have blood cell problems, angulation, high cholesterol, irregular heartbeat, Peyronie's disease, high or low blood pressure, eye disease, a heart attack, liver, kidney, or heart disease, chest pain, cavernosal fibrosis, ulcers, bleeding disorder, diabetes, severe vision loss, a history of a stroke, or in case you are taking or are planning on taking heart or blood pressure medications, conivaptan, antidepressants, antifungal medications, imatinib, doxazosin, antibiotics, seizure medications, HIV/AIDS medicine, isoniazid, rifampin, and diclofenac, as these medications have been reported to affect the success of your treatment. You may need a dose adjustment – and everything will go just as planned. There is no need to worry if you develop any side effect, such as stuffy nose, diarrhea, muscle pain, sore throat, warmth or redness in your face, headache, upset stomach, or memory problems, as those are mild side effects and inmost cases disappear soon.